title: Searching for mammary analogue [corrected] secretory carcinoma of salivary gland among its mimics.
abstract: Mammary analog secretory carcinoma of salivary gland is a recently described entity with unique morphologic, clinical, and genetic characteristics, including the characteristic t(12;15)(p13;q25) with ETV6-NTRK3 translocation found in secretory carcinomas of the breast. Before their initial description, these salivary gland tumors were generally diagnosed as acinic cell carcinoma or adenocarcinoma. For the purpose of this study, all cases of salivary gland acinic cell carcinoma, cribriform cystadenocarcinoma, and adenocarcinoma, not otherwise specified (NOS), diagnosed over a 10-year period were retrieved from our surgical pathology files. There were a total of 11 cases diagnosed as acinic cell carcinoma, 10 cases of adenocarcinoma, NOS, and 6 cases of cribriform cystadenocarcinoma. All slides were reviewed by two pathologists (AP, CGF) and tumors that show morphologic features of mammary analog secretory carcinoma according to the recent literature were selected. This process narrowed down the initial number to six cases originally diagnosed as acinic cell carcinoma, three cases originally diagnosed as adenocarcinoma, NOS, and one case originally diagnosed as cribriform cystadenocarcinoma. The 10 cases were subjected to immunohistochemistry for S-100, mammaglobin, and ANO1, as well as fluorescence in situ hybridization analysis for t(12;15)(p13;q25) with ETV6-NTRK3 fusion rearrangement. The ETV6-NTRK3 gene rearrangement was detected in three tumors. These three tumors, initially diagnosed as acinic cell carcinomas, stained positive for S-100 and mammaglobin, and negative for ANO1 by immunohistochemistry. Two of the three patients were male (2/3). In summary, mammary analog secretory carcinoma is a newly described diagnostic entity that should be in the differential diagnosis of salivary gland tumors that morphologically mimic other neoplasms, mainly acinic cell carcinomas. They differ from conventional acinic cell tumors immunohistochemically and molecularly. Positivity for mammaglobin and S-100, and negativity for ANO1 are useful screening tools before confirmatory molecular studies.
authors.affiliation: Department of Pathology, University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Andre
authors.initials: A
authors.lastname: Pinto
authors.affiliation: Department of Pathology, Massachusetts General Hospital, Boston, MA, USA.
authors.forename: Vania
authors.initials: V
authors.lastname: Nosé
authors.affiliation: Department of Pathology, University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Claudia
authors.initials: C
authors.lastname: Rojas
authors.affiliation: Department of Pathology, University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Yao-Shan
authors.initials: YS
authors.lastname: Fan
authors.affiliation: Department of Pathology, University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Carmen
authors.initials: C
authors.lastname: Gomez-Fernandez
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000075369:Anoctamin-1; D014408:Biomarkers, Tumor / Q000032:analysis / Q000235:genetics; D001706:Biopsy; D001943:Breast Neoplasms / Q000737:chemistry / Q000145:classification / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D002277:Carcinoma / Q000737:chemistry / Q000145:classification / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D018267:Carcinoma, Acinar Cell / Q000737:chemistry / Q000145:classification / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D018118:Chloride Channels / Q000032:analysis; D002881:Chromosomes, Human, Pair 12; D002884:Chromosomes, Human, Pair 15; D003536:Cystadenocarcinoma / Q000737:chemistry / Q000145:classification / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D015321:Gene Rearrangement; D006801:Humans; D007150:Immunohistochemistry; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000032:analysis; D015514:Oncogene Proteins, Fusion / Q000235:genetics; D011237:Predictive Value of Tests; D009418:S100 Proteins / Q000032:analysis; D012468:Salivary Gland Neoplasms / Q000737:chemistry / Q000145:classification / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D060765:Secretoglobins / Q000032:analysis; D014178:Translocation, Genetic; D020812:Receptor, trkC; D000097764:ETS Translocation Variant 6 Protein
chemical_list: D000075369:Anoctamin-1; D014408:Biomarkers, Tumor; D018118:Chloride Channels; D009363:Neoplasm Proteins; D015514:Oncogene Proteins, Fusion; D009418:S100 Proteins; D060765:Secretoglobins; C476213:ANO1 protein, human; C484319:ETV6-NTRK3 fusion protein, human; D020812:Receptor, trkC; D000097764:ETS Translocation Variant 6 Protein